[FISHMAN]

My first question is will a 08 piston from a 250x fit into an 06 250 x
Second question what is the difference between an r headgasket and a x headgasket or is there a difference .
Thanks .

[Asmith]

Question 1 - Yes.

Question 2 - The stock '04 X head gasket measures .4 mm thick. (The '05 and '06 X gaskets are the same part number.)

The '05 R head gasket measures .65 mm thick.
(The '05-'07 R head gaskets are the same.)

Using the Honda Service Manual compression ratio value of 12.9 : 1,
the thicker gasket ('05 R) lowers the compression ratio to 12.3 : 1.

If you want a higher compression ratio, use the '04 X head gasket.

[06CRF]

where are you getting your parts from?, just trying to compare prices